Is PKS 2155 an extragalactic source

Details Is PKS 2155 an extragalactic source Is PKS 2155 an extragalactic source

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ssrv...30..129m&link_type=abstract

(European Space Agency, ESLAB Symposium on X-ray Astronomy, 15th, Amsterdam, Netherlands, June 22-26, 1981.) Space Science Revie

Astronomy and Astrophysics

Astronomy

6

Bl Lacertae Objects, Extragalactic Radio Sources, Iue, Ultraviolet Astronomy, Ultraviolet Spectra, X Ray Sources, Absorption Spectra, Emission Spectra, Spectrum Analysis

Scientific paper

The X-ray source H2155-304, identified with the radio source PKS 2155 and with a 14 mag star-like object, is commonly believed to be a BL Lac object on the basis of the blue featureless continuum, the presence of optical polarization, and the violent variability (mB varies from 12.8 to 14.2 on a time scale of months). This paper presents observations of this source in the far ultraviolet (1200-3000 A) obtained with the IUE. The presence of weak variable emission features is discussed, and the extragalactic nature of the object is questioned.

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